Valve element

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 30/24 (2006.01) B65D 30/26 (2006.01)

Patent

CA 2637263

The valve element for attachment to a flexible bag may include one or more flexible layers intended to extend over a hole disposed through a sidewall of the bag. In its normal condition, the layer or layers are in adjacent contact to each other or to the bag sidewall and thereby cover and seal the hole. During evacuation, the layer or layers displace to provide a collapsible and expandable channel that allows air to move from the hole to an exit point. To facilitate sealing of the valve element, a tacky surface is included in the valve element. The tacky surface can have a tackiness quality that normally holds the layers and / or sidewall together but that can be overcome during evacuation to expand the channel.

La présente invention concerne un élément de valve destiné à être fixé à un sac souple comprenant une ou plusieurs couches souples et à être logé dans un orifice traversant une paroi latérale du sac. A l'état normal, la ou les couches sont en contact l'une avec l'autre ou avec la paroi latérale du sac, l'orifice étant ainsi recouvert et fermé. Lors de l'évacuation, la ou les couches se déplacent pour ménager un canal extensible et rétractable qui permet à l'air de passer par l'orifice vers un point de sortie. Pour faciliter la fermeture étanche de l'élément de valve, celui-ci comprend une surface adhésive. Ladite surface présente un pouvoir adhésif permettant normalement de maintenir en contact les couches et/ou la paroi latérale, mais il est possible de le vaincre pendant l'évacuation pour agrandir le canal.

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